Re: variac question?
- From: Cydrome Leader <presence@xxxxxxxxxxxxxx>
- Date: Wed, 10 Oct 2007 16:04:23 +0000 (UTC)
Grant Erwin <grant@xxxxxxxxxxxxxxxxxx> wrote:
I have a 20 amp variac. Yesterday I tried plugging it into a 20A circuit with
its output voltage set to 30% of input voltage, and it (consistently) popped
the breaker. When I set it to 100% of output voltage, however, it didn't pop
the breaker. Obviously the magnetizing current is higher with the variac turned
down. The question is why? What's going on here?
I believe the variac and my electrical circuits are both in good working
condition, in other words I don't believe this is faulty behavior.
Grant Erwin
Kirkland, Washington
it sounds like you have a short, or have the autoformer wired wrong.
The slider connects to the output side. The input goes across the windings
of the toroid, either at the ends for a 0 to 100% transformer or one end
and a tap for the 0 to 140% ones.
The slider should have no effect on the transformer at no load otherwise.
.
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- From: Grant Erwin
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